@jamzeze I think to answer this you would need to explain how the wall-sockets are linked together. Do they all go to a central switch somewhere? Are there multiple switches? Can you sketch a quick network diagram to help diagnose the problem?

  @jamzeze you'll need to connect the primary deco between the ISP router and the main switch. Try this then see how your network performs. Also, you may want to check with some of the TP link admins to see if the switch you have is compatible with wired backhaul 👍 

  @jamzeze I would just follow the setup advice in the Deco app but I believe they recommend setting them up wirelessly first one by one, then connecting them to the switch one by one 👍 

  @jamzeze I should have asked earlier, but is the Deco system acting as a router or just access points? If it's just access points it shouldn't make a difference if they're all connected to the switch like your diagram but if it's a router then you'll need main one before the switch and I would recommend setting up your isp router in modem mode or bridging mode so it doesn't cause problems with double NAT or DHCP 👍